本书主要面向有MCU开发经验，希望从零开始学习Linux开发的嵌入式软件工程师及在校学生。 目前国内关于嵌入式Linux的教材大都比较老旧，要么是基于多年前的ARM9架构CPU，要么是Linux系统内核还沿用2.6版本的，对于较新的技术如设备树、Yocto编译工具等鲜有介绍。

I couldn't find a location on w3schools to download the database, so I googled it. I found that user AndrejPHP created a query to create the database in SQL, however ...

Abstract: Intelligent reflecting surface (IRS) is an enabling technology to engineer the radio signal propagation in wireless networks. By smartly tuning the signal reflection via a large number of ...